Lee, Hongshin Yoo, Ha-Young Choi, Jihyun Nam, In-Hyun Lee, Sanghyup Lee, Seunghak Kim, Jae-Hong Lee, Changha Lee, Jaesang 2024-01-20T09:31:02Z 2024-01-20T09:31:02Z 2021-09-05 2014-07-15 0013-936X https://pubs.kist.re.kr/handle/201004/126590 Nanosized zerovalent iron (nFe(0)) loaded with a secondary metal such as Ni or Cu on its surface was demonstrated to effectively activate periodate (IO4-) and degrade selected organic compounds at neutral pH. The degradation was accompanied by a stoichiometric conversion of IO4- to iodate (IO3-). nFe(0) without bimetallic loading led to similar IO4- reduction but no organic degradation, suggesting the production of reactive iodine intermediate only when IO4- is activated by bimetallic nFe(0) (e.g., nFe(0)-Ni and nFe(0)-Cu). The organic degradation kinetics in the nFe(0)-Ni(or Cu)/IO4- system was substrate dependent: 4-chlorophenol, phenol, and bisphenol A were effectively degraded, whereas little or no degradation was observed with benzoic acid, carbamazepine, and 2,4,6-trichlorophenol. The substrate specificity, further confirmed by little kinetic inhibition with background organic matter, implies the selective nature of oxidant in the nFe(0)-Ni(or Cu)IO4- system. The comparison with the photoactivated IO4- system, in which iodyl radical (IO3 center dot) is a predominant oxidant in the presence of methanol, suggests IO3 center dot also as primary oxidant in the nFe(0)-Ni(or Cu)/IO4- system. English American Chemical Society ZERO-VALENT IRON PHOTOACTIVATED PERIODATE AQUEOUS-SOLUTION COMMON OXIDANTS ZEROVALENT IRON OXIDATION DEGRADATION PERSULFATE NICKEL MECHANISM Oxidizing Capacity of Periodate Activated with Iron-Based Bimetallic Nanoparticles Article 10.1021/es5002902 1 Environmental Science & Technology, v.48, no.14, pp.8086 - 8093 Environmental Science & Technology 48 14 8086 8093 scie scopus 000339227500051 2-s2.0-84904430795 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article ZERO-VALENT IRON PHOTOACTIVATED PERIODATE AQUEOUS-SOLUTION COMMON OXIDANTS ZEROVALENT IRON OXIDATION DEGRADATION PERSULFATE NICKEL MECHANISM